Endless chain saw.



` T. A. JACKSON.

ENDLESS CHAIN SAW.

APPLICATION FILED MAY 9,19II,

1,0%39433 I Patented Nov. 5,

2 SHEETS-SHEET1 T. A. JACKSON.

BNDLBSS CHAIN SAW.

APPLICATION FILED MAY 9, 1911.

Patented Nov. 5, 1912.

2 SHEETS--SHEET 2 Specication of ALetters' Patent.

' Application led May 9, 1911. Serial No. 626,010.

for readily adjusting the speed of the saw feeding means with respect to the speed of the saw driving means.

This invention is shown in connection with a stone cutting machine.

In the accompanying drawings, Figure l represents the machine in front elevation. Fig. 2 represents 4the machine in end elevation. ig. 3is an enlarged detail-sectional view showing a portion ofthe endless chain saw and the parts adjacent thereto.` Fig. 4V is a horizontal section'taken in the plane of the line A-A of Fig. 3, and Fig. 5 is a vertical transverse section taken in the plane the of the line B-B of Fig. 3.

The truck for supporting the work is denoted by 1 and is hereiny shown as movablealong a track 2, for bringing the work intov position beneath the endless chain saw. The saw comprises? an endless series of chainl links 3 bearing teeth 4 the pivot connections between the links being denoted by 5. l endless cha-in saw is disposed horizontallyv and at its ends it` passes around sprocket wheels 6, the chain links 3l being provided with teeth 7 arranged to be engaged: by the teeth '8 on the sprocket. wheels- 6. These'- teeth 7 of the sprocket chain pass` along" withinupper and lower grooves 9, 10,. in a guide lllocated intermediate the sprocket vvheels 6, for holding the chain against .lat-f 1 eral movement. The sprocket wheelv 6 I'at one nd of the lchain is provided with a Shaft l2= nounted in suitable bearings in a4 bracket 13'l ILtted to slidealong: the uprights; 1.4 of; thm

aid supporting frame. `The Asprocket wheeh It all whom it may concern; 6 at the other end of the chain-is provided Be it known that I, THADDEUs A. .JAoK- With a shaft mounted in adjustable bearsoN, a citizen of the United States, and resiings 16 of a bracket 17 fitted to slide vertident of the, borough of Brooklyn, in the city cally along the uprights 18 at the. other side and State of New York, have invented a 4of the saw supporting frame.4 The upper new and useful Improvement in Endless ends of these sideuprights 14, 18, are con- Chain Saws, of which the following is a nect'ed by a truss beam 19.- The bearings 16 Specification, for the sprocket wheel shaft 15 may be ad- This invention relates to endless chain JUS/ted djIlStiHg SCI'GWS 20, One of saws and has for its objects to provide cerh only rs shown herein for tightening tain improvements in the construction, form The brackets 13, 17,y are and arrangement of the several parts wherelixedly secured to the cross-piece 1l so as to by the machine is materially simplified and form a ysuppert therefor. This is accomstrengthened and its operation facilitated pllshed in the present instance by means of yoke bol-*ts 2l, 22. The brackets13', 17, are provided with lugs 23,-. 24, which engage ro'- tary vertical screws 25, 26,. driven from a' cross shaft 27 28, 29, on the truss beam. .19', in the present instance,- by bevel gear connections` 30, 31, for the screw 25, and 32, 33, for the screw 26. The lower ends of these screws' are rotata'bly mounted inv brackets 34, 35, on the side uprights 14 andIS, of thesaw supporting frame.

he means for feedingthe saw toits work and for moving'thesaw away from its work, is driven from the motor 36, and is constructed, arranv d and operated as follows: Ai vertical sha-igtte 431 is rotatably mounted in upper and lower bearings'42, 43, on the-side upright 14! of th whichshaft-has'a sliding feather andt groove connection with; a bevell gear 44 mounted? ina suitable bearing 45 carried: byr the bracket l3,.which bevelgear44 meshes with a bevel gear 46 fixed.I tdth'e shaft l2 of' the adjacent vertical rotary shaft' 41 frictiom drivingdisk 47' at lts upper end, which d'sk is engaged by afriction w-heel 48 heaving-:a1 sliding feather and groove connection with' ai crosssha'ft 49 mounted at one end-ina suitable bearing 50'; and at its other end: in a=ho11ow adjusting screw 51 having 1sprovided' with a mounted in suitable bearings chain-sawl driving sprocket wheel v6. This `Patented Nov. 5, 1912.

e saw supporting frame, f

a screw-threaded engagement with a block arrangement of the various parts without 52 adjustable on a bracket- 53 supported by departing from the spirit and sco .e of my the upright 14 of the saw carrying frame. invention; hence I do not wish to imit my- This screw 51 is of suilicient length to adjust self strictly to the structure herein shown and described, but

What I claim is:

l. In a machine of the character described, an endless chain saw, brackets for supporting it, a piece connecting the brackets forming a guide for the saw and serving to prevent lateral movement of the cutting portion of the saw, rotary screws engaging the brackets for raising and lowering the saw and means for `driving the saw and for rotating said screws.

2. In a machine of the character described, an endless chain saw, brackets for supporting it, a piece connecting the brac-kets having channels running longitudinally in its upper and lower edges forming a guide for the saw vto prevent lateral movement thereof, rotary screws engaging the brackets for raising and lowering the saw and means for driving the saw and for rotating said screws.

3. In a machine of the character described, an endless chain saw, brackets for supporting it, a piece connecting the brackets forming a guide for the saw and serving to prevent lateral movement of the cutting portion of the saw, rotary screws engaging the brackets for raising and lower-v ing the saw, a motor for driving the saw and means driven from the motor for rotating said screws in either direction.

4. In a machine of the character described, an endless chain saw, brackets for supporting it, ets having channels running longitudinally in its upper and lower edges forming a guide for the saw to prevent lateral movement thereof, rotary screws engaging the brackets for raising and lowering the saw,

a motor for driving t the friction wheel 48 across the center of the friction disk 47 so as to cause the shaft 49 to be rotated in either direction and at varying speeds according to the position of the friction wheel 48. This shaft 49 has a worm and gear connection 54, 55, with a shaft 56 mounted in suitable bearings 57, 58. This shaft 56 is further provided with a spurl gear 59 which meshes with an intermediate gear 60 which, in turn, meshes with a gear 6l loose on the shaft 27. A. clutch is provided for clutching the gear 61 to and releasing it from driving connection with the shaft 27, one member 62 of the clutch being carried by the loose gear 61 and the other member 63 of the clutch having a sliding interlocked connection with said shaft 27. A hand lever 64 is provided for throwing the clutch into and out of operation.

For the purpose of making the connecting piece 11 which carries the endless chain saw, very strong, it is preferably made laminated, the inner lamina being of less width than the outer laminae, thereby forming the upper and lower grooves 9, 10, for receiving the sprocket teeth 7 of the chain. The links 3 of the chain are 0f sufficient width to overlap the lower edges of the outer laminas of the piece 11 and thus have a bearing thereon, and the teeth 7 are of suiicient lengthA to have a bearing on the edges of the inner lamina of said connecting piece. To further strengthen the chain, the outer portions of the links 3 abut as shown at 65, when the chain is straightened, thus helping to prevent the chain from being forced inwardly when acting upon its work. From the above description it will be seen that by adjusting the ratio of the friction drive connection 47, 48, the feeding movement of the saw may be varied with respect to the speed of the saw.

The saw teeth 4 are removably attached to the links 3, as follows: The links 8 are provided with recesses 3* into which .the teeth 4 are inserted, the shape of the recesses and the shape of the teeth being such that the teeth are interlocked with the links against lateral displacement. Pins 4* are provided for locking the saw teeth to the links againstl outward displacement.

It will also be seen that the saw may be moved away from itswork at any time by adjusting the friction wheel 48 across the center of the friction disk 47.

Furthermore, it will be seen that by the provision of a friction drive connection all danger of breakage to the parts by any undue strain upon the feed will be obviated.

It is evident 'that various changes might be resorted to in the construction, form and he saw and means driven from the motor for rotating said screws in either direction.

5. In a machine of the character described, an. endless chain saw, supporting it, apiece connectingthe brackets forming a guide for the saw and'serving to prevent lateral movement of the cutting the brackets for raising and lowering the saw, a motor carried by one of the brackets for driving the saw and means driven from the motor for rot-ating said screws in either direction.

6. In a machine of the character described, an endless chain saw, brackets for ets having channels running longitudinally in its upper and lower edges forming a guide for the saw to prevent lateral movement thereof, rotary screws engaging the brackets for raising and lowering the saw, a motor brackets for supporting it, a piece connecting the-bracka piece connecting the brackortion of the saw, rotary screws engaging carried by one of thebrackets for'driving the saw and means driven from for the motor rotating said screws in either direction. In a machine of the character described, an endless chain saw, brackets for supporting it, a piece connecting the brackets forming a guide for lthe saw and serving to prevent lateral-movement of the cutting portion of the saw, rotary screws engagingr the brackets for raising and lowering the saw, a motor carried by one of the brackets for driving the saw and means driven from vthe motor for rotating said screws in either direction, said means including a friction disk and wheel. v

8. In a machine of` the character described, an endless chain saw, brackets for supporting it, a

piece connecting the brack-` I ets having channels running longitudinally in its upper and lower edges forming a guide for the saw to prevent lateral movement thereof, rotary screws engaging the brackets for raising and lowering the saw, a motor carried by one of the brackets for driving the saw and means driven from the motor for rotating said screws in either direction,

said means including a friction disk and' vwheel.

In testimony, that I claim the foregoing 

